Some in the small community of marathon swimmers have cast doubts on Nyad's swim, which has not been officially ratified, but Nyad and her team have always maintained that she did what she said in 2013 - swim the distance unassisted and without a shark cage.
'Free Solo' filmmakers dive into narrative with thrilling swim drama 'Nyad'
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Nyad ends 2nd attempted swim from Cuba to Florida
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